文件的上传和下载

Posted 2021-06-18 亿钱君

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这里写目录标题

1. 文件的上传和下载

1. 文件的上传和下载

1.1 文件上传

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上传文件–提交

<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2021/6/1
  Time: 8:29
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>

    <form action="http://localhost:8080/08_jsp/uploadServlet" method="post" enctype="multipart/form-data">
        用户名：<input type="text" name="username" /><br>
        头像：<input type="file" name="photo"><br>
        <input type="submit" value="上传">
    </form>
</body>
</html>

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测试提交

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上传文件–接收

package com.atguigu.servlet;

import javax.servlet.ServletException;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author syl
 * @create 2021/6/1-8:34
 */
public class UploadServlet extends HttpServlet {

    //接收数据
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {


        ServletInputStream inputStream = request.getInputStream();
        byte[] buffer = new byte[1024000];
        int read = inputStream.read(buffer);
        System.out.println(new String(buffer,0,read));
    }
}